From bddfe6887f4ba94a8d5bc7ce4fb3fab2be8b2356 Mon Sep 17 00:00:00 2001
From: ndbrew <3947833+ndbrew@users.noreply.github.com>
Date: Thu, 17 Aug 2023 12:56:01 -0700
Subject: [PATCH] feat: add device-mapper extension

Add a new extension for device-mapper kernel drivers

Signed-off-by: ndbrew <3947833+ndbrew@users.noreply.github.com>
---
 Makefile                            |  1 +
 storage/device-mapper/README.md     | 17 +++++++++++++++++
 storage/device-mapper/manifest.yaml | 10 ++++++++++
 storage/device-mapper/pkg.yaml      | 22 ++++++++++++++++++++++
 storage/device-mapper/vars.yaml     |  2 ++
 5 files changed, 52 insertions(+)
 create mode 100644 storage/device-mapper/README.md
 create mode 100644 storage/device-mapper/manifest.yaml
 create mode 100644 storage/device-mapper/pkg.yaml
 create mode 100644 storage/device-mapper/vars.yaml

diff --git a/Makefile b/Makefile
index 5549b649..bc8016de 100644
--- a/Makefile
+++ b/Makefile
@@ -42,6 +42,7 @@ TARGETS = \
 		amd-ucode \
 		bnx2-bnx2x \
 		btrfs \
+		device-mapper \
 		drbd \
 		gasket-driver \
 		gvisor \
diff --git a/storage/device-mapper/README.md b/storage/device-mapper/README.md
new file mode 100644
index 00000000..f232ec96
--- /dev/null
+++ b/storage/device-mapper/README.md
@@ -0,0 +1,17 @@
+# device-mapper
+
+This extension provides kernel modules needed for non-stock device-mapper functionality.
+
+## Installation
+
+Add the extension to your machine config and enable the modules.
+
+```yaml
+machine:
+  install:
+    extensions:
+      - image: ghcr.io/siderolabs/device-mapper:<VERSION>
+  kernel:
+    modules:
+      - name: dm-thin-pool
+```
\ No newline at end of file
diff --git a/storage/device-mapper/manifest.yaml b/storage/device-mapper/manifest.yaml
new file mode 100644
index 00000000..6a81cbb7
--- /dev/null
+++ b/storage/device-mapper/manifest.yaml
@@ -0,0 +1,10 @@
+version: v1alpha1
+metadata:
+  name: device-mapper
+  version: "$VERSION"
+  author: Nathan Brewer
+  description: |
+    This system extension provides extra device-mapper kernel module drivers.
+  compatibility:
+    talos:
+      version: ">= v1.5.0"
diff --git a/storage/device-mapper/pkg.yaml b/storage/device-mapper/pkg.yaml
new file mode 100644
index 00000000..74d90f0c
--- /dev/null
+++ b/storage/device-mapper/pkg.yaml
@@ -0,0 +1,22 @@
+name: device-mapper
+variant: scratch
+shell: /toolchain/bin/bash
+dependencies:
+ - stage: base
+# The pkgs version for a particular release of Talos as defined in
+# https://github.com/siderolabs/talos/blob/<talos version>/pkg/machinery/gendata/data/pkgs
+ - image: "{{ .PKGS_PREFIX }}/device-mapper-pkg:{{ .BUILD_ARG_PKGS }}"
+steps:
+  - prepare:
+      - |
+        sed -i 's#$VERSION#{{ .VERSION }}#' /pkg/manifest.yaml
+  - install:
+      - |
+        mkdir -p /rootfs/lib/modules
+
+        cp -R /lib/modules/* /rootfs/lib/modules
+finalize:
+  - from: /rootfs
+    to: /rootfs
+  - from: /pkg/manifest.yaml
+    to: /
diff --git a/storage/device-mapper/vars.yaml b/storage/device-mapper/vars.yaml
new file mode 100644
index 00000000..df6cc8d5
--- /dev/null
+++ b/storage/device-mapper/vars.yaml
@@ -0,0 +1,2 @@
+# the first part is the driver version and the second the talos version for which the module is built against
+VERSION: "{{ .BUILD_ARG_TAG }}"